JN>  SH> (2) Why do high frequency RF signals attenuate more rapidly than
JN>  SH> low frequency RF signals.
JN>  Or, we could get into a physics discussion over the reflective and
JN>  absorption properties of the atmosphere (troposphere and strarosphere
JN>  and other layers) and how RF signals behave in each of those layers.
The absorption part, I understand. What I do not get, is why the low freq
RF signals in outer space would attenuate at (nearly) the same rate as
here on earth in line of sight..  The FS(free space loss) formula
FSL 20 log (4 pi Dist / Wavelength) applies equally to outer space as it
does here on earth. 
--- GEcho 1.00
---------------